A multi-row air suction type seed sowing fan

Abstract

This invention provides a multi-row pneumatic seeding fan, comprising a fan blade assembly, a motor assembly, and a housing assembly. The fan blade assembly includes a fan cover, fan blades, a guide vane, fan blade spacers, fan blade flange nuts, and gaskets. This design solves the problems of insufficient airflow and unstable air pressure in traditional fans used in multi-row seeding operations, leading to uneven seeding and affecting seeding quality. Furthermore, dust and moisture easily enter the fan, causing bearing damage and further shortening the fan's lifespan. This invention improves fan efficiency and reduces energy loss through optimized fan blade structure and guide vane design; it employs a special bearing sealing structure and drainage design to effectively prevent dust and moisture from entering, extending service life; and the entire machine has a compact structure, is lightweight, easy to install, and has low maintenance costs.

Description

Technical Field

[0001] This utility model is a multi-row air suction seed metering fan, belonging to the field of agricultural seeding equipment technology. Background Technology

[0002] In agricultural sowing operations, air suction seed metering devices are widely used in precision sowing. They use a fan to generate negative pressure to adsorb seeds and achieve seed sowing.

[0003] However, currently used air-suction seed metering fans in agriculture generally suffer from problems such as low efficiency, easy clogging, frequent maintenance, and short service life. Especially in multi-row seeding operations, traditional fans suffer from insufficient airflow and unstable air pressure, leading to uneven seed metering and affecting seeding quality. Furthermore, dust and moisture easily enter the fan's interior, causing bearing damage and further shortening the fan's lifespan. Therefore, there is an urgent need for a multi-row air-suction seed metering fan to solve these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a multi-row air-suction seeding fan to solve the problems mentioned in the background. This utility model improves fan efficiency and reduces energy loss by optimizing the fan blade structure and guide wheel design; it adopts a special bearing sealing structure and drainage design to effectively prevent dust and moisture from entering and extend service life; moreover, the whole machine has a compact structure, light weight, convenient installation, and low maintenance cost.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a multi-row air-suction seeding fan, comprising a fan blade assembly, a motor assembly, and a housing assembly. The fan blade assembly includes a fan shroud, fan blades, a guide wheel, fan blade spacers, fan blade flange nuts, and gaskets. The motor assembly includes a motor housing, a front cover, a rear cover, a double-sided adhesive cover bearing, a magnetic ring, a shaft component, an E-type snap ring, a rotor core, a balance copper block, a bearing wave spring, a heat dissipation fan shroud, heat dissipation fan blades, heat dissipation fan blade gaskets, spring washers, a double-sided iron cover bearing, a stator, an insulating shell, a wire frame, and enameled wire. The housing assembly includes multiple housing screws, multiple fan shroud screws, an external hexagonal flange nut, a wire protection sleeve spacer, an inner silicone outer fiber sleeve, and a viewing port terminal. The fan shroud is fixed to the front end of the motor housing by guide wheel screws, the fan blades are fixed to the front end of the shaft component by multiple fan blade flange nuts and gaskets, the fan blade spacers are disposed between the fan blades and the guide wheel, and the guide wheel is nested inside the fan shroud. The front cover and rear cover... The covers are respectively installed on both ends of the motor housing by multiple body screws. The double-sided adhesive cover bearing is located inside the front cover, and the gap at its connection is filled with bearing gaskets. The double-sided iron cover bearing is located inside the rear cover. The bearing wave spring is located between the rear cover and the double-sided iron cover bearing. The shaft component is supported by the double-sided adhesive cover bearing and the double-sided iron cover bearing. The rotor core is fixed on the shaft component. The magnet ring is embedded in the rotor core. The balance copper block is press-fitted to the end of the rotor core. An E-type snap ring is snapped onto the tail end of the shaft component; the stator is fixed inside the motor housing by an insulating shell and a wire frame, and the enameled wire is wound on the stator; the heat dissipation shroud is fixed to the tail end of the motor housing by shroud screws, the heat dissipation fan blades are installed on the tail end of the shaft component by heat dissipation fan blade washers and spring washers, and are fixed by external hexagonal flange nuts; the wire protection sleeve spacer is set on the side of the motor housing, the inner silicone outer fiber sleeve is sleeved on the lead end of the enameled wire, and the inspection port terminal is connected to the end of the enameled wire.

[0006] Furthermore, the side of the shroud is provided with a drain outlet and an air duct opening.

[0007] Furthermore, the fan blade is a riveted centrifugal aluminum alloy impeller.

[0008] Furthermore, the stator is made of 0.35mm non-oriented silicon steel sheet blocks.

[0009] Furthermore, the magnet ring is made of high-temperature resistant bonded neodymium iron boron material.

[0010] Furthermore, the motor housing is made of aerospace-grade aluminum profile.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a multi-row air-suction seeding fan. Because it incorporates a fan shroud, fan blades, guide vanes, magnetic rings, shaft components, E-type snap rings, rotor core, balance copper blocks, bearing wave springs, heat dissipation shroud, heat dissipation fan blade gaskets, heat dissipation fan blades, double-sided iron-covered bearings, motor housing, cable protection sleeves, inner silicone and outer fiber sleeves, inspection port terminals, and a stator, its structure is reasonable. Through the design of the fan blade assembly, motor assembly, and housing assembly, and by adopting a high-efficiency DC brushless motor structure, the motor efficiency reaches up to 92%, the air volume reaches 260-500 m³ / h, and the air pressure reaches 10 kPa, making it suitable for multi-row seeding operations. By optimizing the fan blade structure and guide vane design, the fan efficiency is improved and energy loss is reduced. The special bearing sealing structure and drainage design effectively prevent dust and moisture from entering, extending the service life. Furthermore, the entire machine has a compact structure, is lightweight, easy to install, has low maintenance costs, and is highly practical. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of a multi-row air-suction seed discharge fan according to the present invention;

[0014] Figure 2 This is a schematic diagram of the upper disassembled structure of a multi-row air-suction seed metering fan according to the present invention;

[0015] Figure 3 This is a schematic diagram of the disassembled structure of the shaft component of a multi-row air-suction seed fan according to this utility model;

[0016] Figure 4 This is a schematic diagram of the E-type snap ring structure of a multi-row air-suction seed metering fan according to this utility model;

[0017] Figure 5 This is a schematic diagram of the motor housing structure of a multi-row air-suction seed fan according to the present invention;

[0018] Figure 6 This is a schematic diagram of the lower disassembled structure of a multi-row air-suction seed fan according to the present invention;

[0019] Figure 7 This is a schematic diagram of the stator structure of a multi-row air-suction seed fan according to the present invention.

[0020] In the diagram: 1-Fan flange nut, 2-Fan cover, 3-Gasket, 4-Fan blade, 5-Guide wheel screw, 6-Guide wheel, 7-Fan blade spacer, 8-Front end cover, 9-Double-sided adhesive cover bearing, 10-Bearing gasket, 11-Magnetic ring, 12-Shaft component, 13-E-type snap ring, 14-Rotor core, 15-Balance copper block, 16-Bearing wave spring, 17-Rear end cover, 18-Body screw, 19-Heat shroud, 20-Fan cover screw, 21-External hexagonal flange nut, 22-Heat shroud gasket, 23-Heat shroud, 24-Spring washer, 25-Double-sided iron cover bearing, 26-Motor housing, 27-Wire protection sleeve spacer, 28-Inner silicone outer fiber sleeve, 29-Inspection port terminal, 30-Stator, 31-Insulation shell, 32-Wire frame, 33-Enameled wire. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1-7This utility model provides a technical solution: a multi-row air-suction seed fan, including a fan blade assembly, a motor assembly, and a housing assembly. The fan blade assembly includes a fan cover 2, fan blades 4, a guide wheel 6, fan blade spacers 7, fan blade flange nuts 1, and gaskets 3. The motor assembly includes a motor housing 26, a front cover 8, a rear cover 17, a double-sided adhesive-covered bearing 9, a magnet ring 11, a shaft 12, an E-type retaining ring 13, a rotor core 14, a balance copper block 15, a bearing wave spring 16, a heat dissipation fan cover 19, a heat dissipation fan blade 23, a heat dissipation fan blade gasket 22, a spring gasket 24, a double-sided adhesive-covered bearing 25, and a stator 30. The components include an insulating shell 31, a wire frame 32, and enameled wire 33; the outer casing assembly includes multiple body screws 18, multiple fan cover screws 20, external hexagonal flange nuts 21, wire sheath spacers 27, inner silicone outer fiber sheath 28, and inspection port terminals 29; the fan cover 2 is fixed to the front end of the motor housing 26 by guide wheel screws 5, the fan blade 4 is fixed to the front end of the shaft 12 by multiple fan blade flange nuts 1 and washers 3, the fan blade spacers 7 are set between the fan blade 4 and the guide wheel 6, and the guide wheel 6 is nested inside the fan cover 2; the front cover 8 and the rear cover 17 are respectively installed on both sides of the motor housing 26 by multiple body screws 18. At the end, a double-sided adhesive-covered bearing 9 is installed inside the front cover 8, and the gap at its connection is filled with a bearing gasket 10. A double-sided iron-covered bearing 25 is installed inside the rear cover 17, and a bearing wave spring 16 is installed between the rear cover 17 and the double-sided iron-covered bearing 25. The shaft core 12 is supported by the double-sided adhesive-covered bearing 9 and the double-sided iron-covered bearing 25. The rotor core 14 is fixed on the shaft core 12. The magnet ring 11 is embedded in the rotor core 14. The balance copper block 15 is pressed onto the end of the rotor core 14. The E-type snap ring 13 is snapped onto the tail end of the shaft core 12. The stator 30 is fixed to the motor housing through the insulating shell 31 and the wire frame 32. Inside the motor housing 26, enameled wire 33 is wound around the stator 30; the heat dissipation shroud 19 is fixed to the tail of the motor housing 26 by shroud screws 20, and the heat dissipation fan blades 23 are installed on the tail end of the shaft component 12 by heat dissipation fan blade gaskets 22 and spring washers 24, and are fixed by external hexagonal flange nuts 21; the wire protection sleeve spacer 27 is set on the side of the motor housing 26, the inner silicone outer fiber sleeve 28 is sleeved on the lead end of the enameled wire 33, and the inspection port terminal 29 is connected to the end of the enameled wire 33. This design solves the problem that in current multi-row sowing operations, traditional fans have insufficient air volume and unstable air pressure, resulting in uneven seeding and affecting sowing quality. In addition, dust and moisture can easily enter the inside of the fan, causing bearing damage and further shortening the fan's lifespan.

[0023] As the first embodiment of this utility model: the side of the fan cover 2 is provided with a drain outlet and an air duct opening. The added drain outlet can allow a small amount of liquid water that is accidentally sucked in to be discharged from the machine body in time, so as to avoid the accumulation inside the fan and affect its performance or cause the parts to rust. The air duct opening is combined with the internal centrifugal air duct, so that the dust or foreign objects thrown out by centrifugal force can be discharged directly in the tangential direction, forming an effective self-cleaning channel, which significantly improves the working reliability of the fan in harsh farmland environments.

[0024] The 4th blade is a riveted centrifugal aluminum alloy impeller. The added riveting structure ensures the connection strength of the blades and avoids the risk of deformation during high-speed rotation. The use of aluminum alloy material ensures structural sturdiness while achieving lightweight design, reducing the overall weight and rotational inertia, which is beneficial for the rapid start-up and speed increase of the motor.

[0025] The stator 30 is made of 0.35mm non-oriented silicon steel sheet blocks. The added block-type silicon steel sheet structure not only facilitates processing and winding, but more importantly, it effectively reduces eddy current loss and iron loss. It is particularly suitable for making low voltage (such as 12V) version motors, improving the energy conversion efficiency of the motor to 92%.

[0026] The magnet ring 11 is made of high-temperature resistant bonded neodymium iron boron material. By adding this high-performance magnetic material, its inherent high-temperature resistance ensures that the magnetic performance of the motor is stable and does not demagnetize when the motor is working under continuous high load. This ensures that the fan can still output stable air volume and air pressure under long-term high-speed operation (speed up to 16,000 to 25,000 rpm).

[0027] The motor housing 26 is made of aerospace aluminum profile. The excellent thermal conductivity of the aerospace aluminum profile allows the heat generated by the motor during operation to be quickly conducted to the housing and dissipated into the environment, preventing the motor from becoming inefficient or damaged due to excessive temperature rise. At the same time, the aluminum material itself is lightweight, further reducing the overall weight of the fan.

[0028] As a second embodiment of this utility model: First, the stator of the motor is assembled. The stator 30 is reliably insulated and fixed inside the motor housing 26 by the insulating shell 31 and the wire frame 32. Then, the enameled wire 33 is precisely wound on the stator 30 according to the preset number of turns and phase, completing the preparation of the stator assembly. Next, the rotor power assembly is assembled. The rotor core 14 is fixed on the shaft member 12, and then the magnet ring 11 is embedded in the rotor core 14. The balance copper block 15 is pressed into the end of the rotor core 14, and precise dynamic balancing is performed to ensure the stability of the rotor during high-speed operation. Finally, the E-type snap ring 13 is inserted into the slot at the tail end of the shaft member 12 to prevent axial movement of the rotor assembly. Then, the bearing end cover system is assembled and assembled. The double-sided adhesive cap bearing 9 is pressed into the bearing chamber of the front end cover 8, and the bearing shim 10 is filled into the gap at the connection to adjust the preload. The double-sided iron-cap bearing 25 is placed into the bearing chamber of the rear end cover 17, and a bearing wave spring 16 is installed. This wave spring provides continuous axial spring force to compensate for thermal expansion and absorb some vibration. The assembled front end cover 8 and rear end cover 17 are precisely installed and fixed to both ends of the motor housing 26 using multiple body screws 18. Then, the complete rotor power assembly is installed into the motor housing 26, so that both ends of the shaft 12 are supported by double-sided adhesive-cap bearings 9 and double-sided iron-cap bearings 25, respectively. Next, the airflow generation module is assembled. The fan blade 4 is fitted onto the front end of the shaft 12, and the gasket 3 is installed. Then, it is locked and fixed using multiple fan blade flange nuts 1. The fan blade spacer 7 is fitted onto the shaft 12 and placed behind the fan blade 4. The guide wheel 6 is nested inside the fan shroud 2, and then the entire fan shroud 2 assembly is fixed to the front end of the motor housing 26 using guide wheel screws 5, completing the encapsulation of the volute air duct. The heat dissipation system is then assembled. Insert the cooling fan blade 23 onto the tail end of the shaft component 12, then install the cooling fan blade gasket 22 and spring washer 24 in sequence, and finally tighten them with the external hexagonal flange nut 21. Install the cooling fan cover 19 onto the tail end of the motor housing 26 using the fan cover screw 20, which protects the cooling fan blade 23 and guides the cooling airflow. Finally, assemble and protect the electrical leads, installing the wire protection sleeve spacer 27 at the wire outlet position on the side of the motor housing 26. Cover the lead end of the enameled wire 33 with an inner silicone outer fiber sheath 28, which provides both electrical insulation and mechanical wear resistance. Then connect the lead to the inspection port terminal 29 to form a standardized external power interface.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-row air-suction seed fan, comprising a fan blade assembly, a motor assembly, and a housing assembly, characterized in that: The fan assembly includes a fan cover (2), a fan blade (4), a guide wheel (6), a fan blade spacer (7), a fan blade flange nut (1), and a gasket (3); the motor assembly includes a motor housing (26), a front cover (8), a rear cover (17), a double-sided adhesive cover bearing (9), a magnet ring (11), a shaft (12), an E-type snap ring (13), a rotor core (14), a balance copper block (15), a bearing wave spring (16), a heat dissipation fan cover (19), a heat dissipation fan blade (23), a heat dissipation fan blade gasket (22), a spring washer (24), a double-sided iron cover bearing (25), a stator (30), an insulating shell (31), a wire frame (32), and enameled wire (33); the outer casing assembly includes multiple housing screws (18), multiple fan cover screws (20), an external hexagonal flange nut (21), a wire sheath spacer (27), an inner silicone outer fiber sheath (28), and a viewing port terminal (29); The fan cover (2) is fixed to the front end of the motor housing (26) by the guide wheel screw (5). The fan blade (4) is fixed to the front end of the shaft component (12) by multiple fan blade flange nuts (1) and gaskets (3). The fan blade spacer (7) is set between the fan blade (4) and the guide wheel (6). The guide wheel (6) is nested inside the fan cover (2). The front cover (8) and the rear cover (17) are respectively installed on the motor housing by multiple housing screws (18). At both ends of the housing (26), the double-sided adhesive cap bearing (9) is located inside the front end cap (8), and the gap at its connection is filled with bearing gaskets (10). The double-sided iron cap bearing (25) is located inside the rear end cap (17), and the bearing wave spring (16) is located between the rear end cap (17) and the double-sided iron cap bearing (25). The shaft core (12) is supported by the double-sided adhesive cap bearing (9) and the double-sided iron cap bearing (25), and the rotor core (14) is fixed. On the shaft (12), the magnet ring (11) is embedded in the rotor core (14), the balance copper block (15) is pressed onto the end of the rotor core (14), and the E-type snap ring (13) is snapped onto the tail end of the shaft (12); the stator (30) is fixed inside the motor housing (26) by the insulating shell (31) and the wire frame (32), and the enameled wire (33) is wound on the stator (30); the heat dissipation shroud (19) is connected by shroud screws. (20) is fixed to the tail of the motor housing (26). The heat dissipation fan (23) is installed on the tail end of the shaft part (12) through the heat dissipation fan gasket (22) and the spring washer (24), and is fixed by the external hexagonal flange nut (21). The wire protection sleeve partition (27) is set on the side of the motor housing (26). The inner silicone outer fiber sleeve (28) is sleeved on the lead end of the enameled wire (33). The peep port terminal (29) is connected to the end of the enameled wire (33).

2. The multi-row air-suction seed metering fan according to claim 1, characterized in that: The side of the hood (2) is provided with a drain outlet and an air duct opening.

3. The multi-row air-suction seed fan according to claim 1, characterized in that: The impeller (4) is a riveted centrifugal aluminum alloy impeller.

4. The multi-row air-suction seed metering fan according to claim 1, characterized in that: The stator (30) is made of 0.35mm non-oriented silicon steel sheet blocks.

5. A multi-row air-suction seed fan according to claim 1, characterized in that: The magnet ring (11) is made of high-temperature resistant bonded neodymium iron boron material.

6. A multi-row air-suction seed fan according to claim 1, characterized in that: The motor housing (26) is made of aviation aluminum profile.

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